preferred to him, deduces the origin of the old Academy from Socrates; he treats of its doctrines as relating to physics, logic, and morals, and traces its progress under Plato and his legitimate successors. Cicero takes up the discourse when this historical account is brought down to Arcesilaus, the founder of the new Academy. But the work is broken off in the most interesting part, and just as the author is entering on the life and lectures of Carneades, who introduced the new Academy at Rome. Cicero, however, while he styles it the new Academy, will scarcely allow it to be new, as it was in fact the most genuine exposition of those sublime doctrines which Plato had imbibed from Socrates. The historical sketch of the Academic philosophy having been nearly concluded in the first book, the remaining books, which are lost, contained the disputatious part. In the second book the doctrines of Arcesilaus were explained; and from one of the few short fragments preserved, there appears to have been a discussion concerning the remarkable changes that occur in the colour of objects, and the complexion of individuals, in consequence of the alterations they undergo in position or age, which was one of Arcesilaus’ chief arguments against the certainty of evidence derived from the senses. The third and fourth books probably contained the doctrines of Carneades and Philo, with Varro’s refutation of them, according to the principles of Antiochus. From a fragment of the third book, preserved by Nonius, it appears that the scene of the dialogue was there transferred to the banks of the Lucrine lake, which lay in the immediate vicinity of Varro’s Cuman villa(419). These four books formed the work which Cicero wished to be considered as the genuine and improved Academics. The former edition, however, which he had sent to Atticus, had gone abroad, and as he could not recall it, he resolved to complete it, by prefixing an introductory eulogy of Catulus to the first, and of Lucullus to the second book,—extolling, in particular, the incredible genius of the latter, which enabled him, though previously inexperienced in the art of war, merely by conversation and study, during his voyage from Rome, to land on the coast of Asia, with the acquirements of a consummate commander, and to extort the admission from his antagonist, Mithridates, who had coped with Sylla, that he was the first of warriors.